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Finding the Fourth Proportional to 31,590.80, 47,353.80 and 18,436.40

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Solution

The fourth proportional to 31,590.80, 47,353.80 and 18,436.40 is: 27,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,590.80 : 47,353.80 = 18,436.40 : x
  2. Step 2: Convert to fraction form
    31,590.80/47,353.80 = 18,436.40/x
  3. Step 3: Cross multiply
    31,590.80x = 47,353.80 × 18,436.40
  4. Step 4: Simplify right side
    31,590.80x = 873,033,598.32
  5. Step 5: Solve for x
    x = 873,033,598.32/31,590.80
  6. Step 6: Final answer
    x = 27,635.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.